Display device

Abstract

Inside an outer frame, which is interposed at between opposedly facing peripheries between a back substrate and a front substrate, there is an inner frame which fixes both end portions of plate member control electrodes, which are constituted of a large number of parallel strip-like electrode elements. By integrally forming the plate member control electrodes such that the plate member control electrodes are fixed to both end portions of a display region, a single part is formed. Further, a getter chamber is formed between the outer frame and the inner frame and getters are accommodated in the getter chamber. Due to such a constitution, the operability and yield rate of products at the time of assembling can be enhanced. Further, it is possible to hold a desired degree of vacuum in the space between the substrates for a long time.

1. A display device comprising:
 a front substrate having an anode and fluorescent materials on an inner surface thereof;  
 a back substrate having a plurality of cathode lines, which extend in a first direction, are arranged in parallel in a second direction which crosses said first direction and include electron sources, and plate member control electrodes, which are formed by arranging a plurality of strip-like electrode elements, which cross the cathode lines in a non-contact state within a display region, extend in said second direction, are arranged in parallel in said first direction and have electron passing apertures which allow electrons from the electron sources to pass therethrough to the front substrate side, on an inner surface thereof, the back substrate being arranged to face the front substrate in an opposed manner with a given gap therebetween;  
 an outer frame for maintaining the given gap, which outer frame is interposed between the front substrate and the back substrate and surrounds the display region; and  
 an inner frame which is arranged outside the display region and inside the outer frame and fixes both end regions of the strip-like electrode elements which constitute the plate member control electrodes to the back substrate.  
 
     
     
       2. A display device according to  claim 1 , wherein, with respect to the height of the outer frame and the height of the inner frame in a direction which is orthogonal to the surfaces of the front substrate and the back substrate, the height of at least one portion of the inner frame is set to be lower than the height of the outer frame. 
     
     
       3. A display device according to  claim 1 , wherein the inner frame is formed by integrally combining a plurality of members into a frame shape. 
     
     
       4. A display device according to  claim 3 , wherein the plurality of members which constitute the inner frame are constituted of a first pair of sides and a second pair of sides, and, at end portions of the first pair of sides and the second pair of sides, inclined surfaces which complementarily engage with each other in a direction orthogonal to the front substrate and the back substrate are formed. 
     
     
       5. A display device comprising:
 a front substrate having an anode and fluorescent materials on an inner surface thereof;:  
 a back substrate having a plurality of cathode lines, which extend in a first direction, are arranged in parallel in a second direction which cross said first direction and include electron sources, and plate member control electrodes, which cross the cathode lines in a non-contact state within a display region, extend in said second direction, are arranged in parallel in said first direction and have electron passing apertures which allow electrons from the electron sources to pass therethrough to the front substrate side, on an inner surface thereof, the back substrate being arranged to face the front substrate in an opposed manner with a given gap therebetween;  
 an outer frame for maintaining the given gap, which outer frame is interposed between the front substrate and the back substrate and surrounds the display region;  
 an inner frame which is arranged outside the display region and inside the outer frame and fixes both end portions of the plate member control electrodes to the back substrate; and  
 a plurality of gap holding members which are provided within the display region surrounded by the inner frame and maintain a gap defined between the front substrate and the back substrate.  
 
     
     
       6. A display device according to  claim 5 , wherein with respect to the height of the outer frame and the height of the inner frame in a direction which is orthogonal to the surfaces of the front substrate and the back substrate, the height of at least one portion of the inner frame is set to be lower than the height of the outer frame. 
     
     
       7. A display device according to  claim 5 , wherein grooves which engage with the plurality of gap holding members at given positions are formed on opposing surfaces of one pair of two parallel sides of the inner frame. 
     
     
       8. A display device according to  claim 5 , wherein the plurality of gap holding members are fixed to opposing faces of one pair of two parallel sides of the inner frame at the given positions using glass frit. 
     
     
       9. A display device according to  claim 5 , wherein grooves which serve to position the respective strip-like electrode elements of the plate member control electrodes are formed on sides of the inner frame which face the plate member control electrodes formed on the back substrate in an opposed manner. 
     
     
       10. A display device according to  claim 5 , wherein frit grass is used for fixing the respective strip-like electrode elements of the plate member control electrodes to given positions on sides of the inner frame which face the plate member control electrodes formed on the back substrate in an opposed manner. 
     
     
       11. A display device according to  claim 5 , wherein grooves which serve to position the respective strip-like electrode elements of the plate member control electrodes are formed on sides of the gap holding members which face the plate member control electrodes formed on the back substrate in an opposed manner. 
     
     
       12. A display device according to  claim 5 , wherein pressing plates which sandwich and fix the plate member control electrodes together with the inner frame are formed on the back substrate. 
     
     
       13. A display device according to  claim 12 , wherein grooves which accommodate the pressing plates are formed on the back substrate. 
     
     
       14. A display device comprising:
 a front substrate having an anode and fluorescent materials on an inner surface thereof;  
 a back substrate having a plurality of cathode lines, which extend in a first direction, are arranged in parallel in a second direction which crosses said first direction and include electron sources, and a plurality of control electrodes, which cross the cathode lines in a non-contact state within a display region, extend in said second direction, are arranged in parallel in said first direction and allow electrons from the electron sources to pass therethrough to the front substrate side, on an inner surface thereof, the back substrate being arranged to face the front substrate in an opposed manner with a given gap therebetween;  
 an outer frame for maintaining the given gap, which outer frame is interposed between the front substrate and the back substrate and surrounds the display region;  
 an inner frame arranged outside the display region and inside the outer frame; and  
 includes a getter chamber between the outer frame and the inner frame.  
 
     
     
       15. A display device according to  claim 14 , wherein members, which serve to suppress the movement of getters, are formed between the inner frame and the outer frame. 
     
     
       16. A display device according to  claim 14 , wherein an adhesive is provided to the getter chamber for fixing the getters. 
     
     
       17. A display device according to  claim 14 , wherein projection members, which serve to position the inner frame at a given position, are provided between the inner frame and the outer frame.